So basically, if you have 2 skilled bombers and 1 unskilled cap, the bombers should be punished for being skilled?
Stop comparing SNAC to a cruiser mortar. It's not as fast (Cruiser mortar is more than twice as fast) and cannot be shot from the same distance (Cruiser mortar can be shot about 4 times further).
Stop hating on something that isn't broken. In order to hit with a SNAC you need to get hideously close to a battleship already, and unless you fire it at distance<800 most caps can easily dodge the fire by TSing.
Now you might scream "NOVA TORPS!!!". Do an experiment, take a fighter+battleships (2 players) and put them up against 2 bombers (again, two players). Put some flaks on the capship and see how the two miserable bombers can't do crap, and if they are not a heavy bomber (which means they either have SNAC or Nova) they have no chance of winning what-so-ever, due to low DPS.
Heavy bombers? Get eaten by the fighter as the cap only dodges your nova torps.